Is a cat better than a partner? New research shows just how much furry friends can boost people's moods.
Pets ‘just as good as a marriage’

Glossary
Data - Pieces of information.
Satisfaction - Pleasure or happiness.
Hormones - Chemicals created inside living creatures. They are used to send messages from one part of the body to another.
Depression - Low mood that affects someone's daily life, and can last for weeks or months.
Ethics - The moral rules that people follow in order to have a good life and benefit society.
Profoundly - Deeply.
Frustrating - Upset or annoying.